Retainer spring for cam follower in brake shoe



FIG. 1 is a perspective view of a retainer spring for cam follower in brake shoe embodying my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof; and

FIG. 4 is a front elevational view thereof. 

The ornamental design for a retainer spring for cam follower in brake shoe, as shown. 